Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0f628ed752754b…

MALICIOUS

PDF

95.5 KB Created: 2021-07-02 22:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 22f6dd643feb33912ac8ab804c328e59 SHA-1: 93505b2fc0d916c1b19bc81bc9cc86e1af22b6d7 SHA-256: db0f628ed752754b747f08be7535c843a90e79701f8a82f0792a9eed2fc58092
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning model. It contains a fake CAPTCHA lure, a common technique to trick users into clicking malicious links. Several URLs were extracted, some pointing to compromised WordPress sites and one using a raw IP address, indicating a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f51f646a009121b1668d1340094f738/8056207872.pdf In PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/zifonebunudose.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/99hmlfv7dl9i3teijej2tdslc6/zeruxojelomixigogu.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/kuset.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079acf2a0724---92619869579.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/0lgtms7c9b5cv9n4ql1njqngg7/pijenozoxegorame.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/lajarefupe.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/wewosijafabufomad.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/692d2c6c1110d2a7a547d3d2f6951588/7298386844.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eab3585a39---71117515942.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/l73r7ns5acpkvos622g93fa2i8/46492436516.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/58565107810.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/66501846988.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/gvqo0uifnakio0g2b9ask1ftc3/97502562969.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/3b60c2bf95a86ea15be333338dc8ff82/tutafobepu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/m586ecctellp95kvd2s2jamtal/gimivanivi.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608102a60fb02---sidarobabopafibabezutamop.pdfIn PDF document text
    • http://cfacgroupe.com/uploads/FCK_files/file/34063876168.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0baedb972---43428404150.pdfPDF link annotation
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2e12e09636d69f6f5429fe2217dd4a82/35246922960.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a25181d18---fodatufufatupowutagad.pdfIn PDF document text
    • http://funperm.ru/content/file/81730970706.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16097325f88c2f---wadolomafunusefedemuka.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16079d6c1a4b74---sowuwuwoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=syncro+omegle+ip+locationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 10120 bytes
SHA-256: 916c88407b03fb78081e049446fa775a879f1afbc79b9621588cf912597e2795
font_01_sfnt_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001282e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282E 10740 bytes
SHA-256: d26a1060ef15487b86623e79e94613576aa0b7c4965eb2e34e6d5cd2ff171add
font_03_sfnt_off000140e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E1 18032 bytes
SHA-256: 8ba88fb77c7021efafe8520481188b37b8c9740e599ac75a4cf5484d5fc4de2c

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